RU184592U1 - Coupling - Google Patents

Abstract

The utility model relates to elastic joints, namely to couplings. The technical result of the proposed utility model is the provision of significant torque during bending and longitudinal vibrations, as well as minimum mass dimensions of the coupling. The coupling has an integral revolving - drum form. The elastic elements are made in the form of cylinders, and the means acting on the elastic elements are made in the form of jumpers located between the elastic elements around the circumference, jumpers are made with longitudinal holes for alternately mounting respectively to the leading and driven flanges. The fastening of the proposed coupling on the one hand to the engine and, on the other hand, to the shaft shaft provides smooth transmission of torque under conditions of kink and axle displacement. This is achieved due to spatial elastic deformation of the elastic elements. And when torque is applied to the coupling, forces appear that act in the transverse plane of the elastic cylindrical elements and tend to push or pull them together. The elimination of relative displacement in this case occurs both due to elastic deformation and due to internal friction of the material of cylindrical elastic elements.

Description

The utility model relates to elastic non-support connections of a ship propulsion complex, namely to elastic couplings connecting a power take-off shaft of a shock-absorbed main diesel engine to a ship shaft shaft.

Known coupling for an elastic connection company "Pul" (France) [1] - 123 (Fig. III. 61). The coupling consists of cams, between which rubber elastic elements are located in the form of balls or cylinders.

A clutch is also known [2], which consists of two drums with external and internal ribs (prototype). These ribs form cavities. The same elastic cylindrical rubber elements are inserted into the cavity.

Significant disadvantages of the known couplings [1, 2] are low torque, large dimensions and weight. Since there are no fasteners for ribs with elastic elements, only half of the elastic elements participate in deformation during the operation of the coupling during torsional vibrations.

The technical result of the proposed utility model is the provision of significant torque during bending and longitudinal vibrations, as well as minimum weight and size.

The specified technical result is achieved by the fact that:

1. The elastic elements and the means acting on them are made integral;

2. The elastic elements are made of at least four cylinders;

3. The tool acting on the elastic elements is made in the form of jumpers located between the elastic elements around the circumference;

4. Jumpers are made with longitudinal holes for sequential fastening on the one hand to the lead, and on the other hand to the driven flanges;

5. The coupling has an integral revolving - drum form.

These features provide simultaneous deformation of all cylindrical elastic elements, since they are made integral with jumpers. When transmitting torque from the leading flange to the driven one with the occurrence of torsional vibrations, alternately half of the elastic elements work in compression, and the other half works in tension.

The integral cylindrical shapes of the elastic elements of the coupling ensure its efficiency in fractures and displacements of the driving and driven flanges caused by inaccurate installation.

In FIG. 1 shows a general view of an integral revolving - block coupling without leading and driven parts, and in FIG. 2 is a diagram of a typical embodiment of a propulsive complex.

The coupling contains cylindrical elastic elements 1, the means acting on the elastic elements 1, made in the form of jumpers 2 located between the elastic elements in a circle, longitudinal holes A and B for alternately fastening on the one hand to the lead (for example, holes A), and on the other sides - to the driven (holes B) flanges 3 and 4 (Fig. 2).

To increase the strength of the coupling of the recess - the fillet between the cylindrical elastic elements 1 and the bridges 2 are made with a fairly smooth radial transitions.

The coupling 1 (Fig. 2) works as follows.

- силы инерции соответственно поступательно движущихся масс и вертикальная составляющая сил инерции вращающихся масс, вызывающие вертикальные перемещения и вибрации, а также деформацию колен коленчатого вала в плоскости XOY;

- горизонтальная составляющая сил инерции ВМ, вызывающая поперечные смещения и вибрацию ДВС в горизонтальной плоскости XOY; ±Q - горизонтальная сила, действующая вдоль оси валопровода и вызывающая его продольные колебания; Р_В - сила упора гребного винта, вызывающая продольные колебания валопровода за счет наличия переменной добавки ±ΔР_В

;

- поперечная вертикальная и поперечная горизонтальная силы, образующиеся за счет наличия эксцентриситета е между теоретическим местом приложения упора гребного винта Р_В (строго по оси валопровода) и истинным

вызывающие поперечные, горизонтальные и вертикальные колебания в системе валопровода в плоскости YOZ соответственно; P=P₀sinkt - суммарная вынуждающая сила, вызывающая вертикальную вибрацию на лапах крепления ДВС к фундаменту с частотой k; F=F₀sinkt - суммарная вынуждающая сила, передаваемая на фундамент (корпус судна) через систему виброизоляции ДВС;

- движущий момент двигателя, вызывающий крутильные колебания валопровода за счет наличия переменной составляющей ±ΔМ_θ; М_С - момент сопротивления гребного винта, вызывающий крутильные колебания валопровода за счет наличия составляющей ±ΔМ_С, обусловленной работой винта в косом потоке набегающей воды, влиянием корпуса, рулевого комплекса и искажением геометрии винта; ±F_{k, k+1} - упругие моменты, действующие на участках валопровода.The main variables of forces and moments acting in the elements of the SEED (Fig. 2): ± P _j , ±

- the inertia forces of the correspondingly moving masses and the vertical component of the inertia forces of the rotating masses, causing vertical displacements and vibrations, as well as the deformation of the crankshaft knees in the XOY plane;

- the horizontal component of the inertial forces of the VM, causing lateral displacements and vibration of the internal combustion engine in the horizontal XOY plane; ± Q is the horizontal force acting along the axis of the shaft shaft and causing its longitudinal vibrations; P _B is the thrust of the propeller, causing longitudinal shafting due to the presence of a variable additive ± ΔP _B

;

- transverse vertical and transverse horizontal forces generated due to the presence of eccentricity e between the theoretical place of application of the stop of the propeller R _B (strictly along the axis of the shaft)

causing transverse, horizontal and vertical vibrations in the shafting system in the YOZ plane, respectively; P = P ₀ sinkt is the total driving force that causes vertical vibration on the legs of the ICE to the foundation with a frequency k; F = F ₀ sinkt - total driving force transmitted to the foundation (hull of the vessel) through the engine vibration isolation system;

- the driving moment of the engine, causing torsional vibrations of the shaft line due to the presence of a variable component ± ΔM _θ ; M _C is the moment of resistance of the propeller, causing torsional vibrations of the shaft line due to the presence of the component ± ΔM _C , due to the operation of the screw in the oblique flow of incoming water, the influence of the hull, steering complex and distortion of the geometry of the screw; ± F _{k, k + 1} - elastic moments acting on sections of the shaft line.

When working SDEU all forces and moments act interconnectedly and simultaneously.

Due to vibrations and deformations of the shafts, as well as the foundation under load, the achievement of strict alignment of the shafts is associated with considerable laboriousness and is not always justified, and in some cases difficult to implement.

The fastening of the coupling 1 (Fig. 2) on one side 3 to the engine 5, and on the other 4 to the shaft shaft provides a smooth transmission of torque under conditions of kink and axle displacement. This is achieved due to spatial elastic deformation of the elastic elements 1 (Fig. 1). And when a torque is applied to the coupling, forces appear that act in the transverse plane of the elastic cylindrical elements 1 and tend to push or pull them together. The elimination of relative displacement in this case occurs both due to elastic deformation and due to internal friction of the material of cylindrical elastic elements.

In FIG. 2: 6 - elastic connection of the engine 5 with the foundation; 7 - propeller; 8, 9 - thrust and thrust bearings.

Thus, the transmission of torque occurs in bending and longitudinal vibrations.

Information sources

1. Polyakov B.C., Barbash I.D., Ryakhovsky O.A. Coupling reference. - L .: Engineering, 1979. - 344 p.

2. Marine Propulsion I August / September I 2004. Centa solves noise and vibration problem (New coupling solutions from Renold). www.mpropulsion.com. [(p. 94), prototype]. Copies of the drawing and article are attached.

Claims (1)

A coupling containing elastic elements, a means acting on the elastic elements during the operation of the coupling, characterized in that the coupling has an integral revolving - drum shape, the elastic elements are made in the form of cylinders, and the means acting on the elastic elements are made in the form of jumpers located between elastic elements around the circumference, jumpers are made with longitudinal holes for alternate mounting respectively to the leading and driven flanges.

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